Telephone system.



S. L. VAN ARIN, Jn. TELEPHONE SYSTEM.

APPLIUATION FILED IEB.2. 1910.

Patented Mar. 26, 1912.

a SHEETS-SHEET 1.

S. L. VAN AKIN, JB. TELEPHONE SYSTEM.

APPLIGATION Hup H5352, 1910.

Patented Mar. 26, 1912.

3 SHEETS-BEEET 3.

In ven lqr M712 ewes www@ c/Yllvrmg/ UNITED sTATEs PATENT oEEIoE- SAMUEL LEWIS VAN AKIN, JR., 0F LIVERPOOL, NW YORK.

TELEPHONE SYSTEM.

ARIN, Jr., of Liverpool, in the county of` Onondaga, in the State of New York, have invented new and useful Improvements in Telephone Systems, of .which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to certain improvements in telephonie instruments of a class set forth in my pending application No. 420,256, ined March 10,1908.

The main object is to mount the transmitter and receiver upon and some distance to one side of the axis of a hollow swinging support carrying a circuit closer and suitable circuit connections passing through and concealed within the hollow support and connecting the circuit closer tothe transmitter and to the receiver, so that the telephonie instruments may be swung to any convenient position for. the operator through an arc of comparatively long radius without liability of twisting or kinking the circuit connections or otherwise straining any of the fastenings therefor, and at the same time permitting the circuits to be opened and closed by simply swinging the hollow support to dierent positions. y

One of the specific objects of my present invention is to mount the receiver upon its hollow supporting arm, so as to be capable of oscillatory movement in any direction to readily kadjust itself to the ear when in use.

A further ob-ject is to provide means for frictionally retaining the hollow support! in either of its adjusted positions.

Other objects and uses relating to the .spe-

` cie parts of the device will be brought out in the following description:v

In the drawings: Figure l` is an elevation partly in section `of myimproved telephonie instrument showing the switch box and a portion of a desk or table upon which the apparatus is mounted but omitting the pedal operated and manually operated switches shown in Fig. 11. Fig. 2 is an enlarged front elevationpartly in section of the instrument shown in Fig. l omitting the switch box. Figs. 3 and t are enlargedV sectional views taken respectively on lines A-A and B B, Fig. 2. Figs. 5 and 6 are perspective views of the hinge connections between the receiver and its supporting arm. Fig. 7 is an enlarged vertical sectional View Specification of Letters Patent.

` Application filed February 2, 1910.

f slots Patented Mar. 26, 1912.

Serial No. 541,588.

through the switch, switch-box and adjacent portion of the tubular standard showing also a portion of the supporting bed or table upon which these parts are mounted. Figs. 8, 9 and 10 are enlarged transverse sectional views taken respectively on lines O O, D I) and E E, Fig. 7. Fig. 11 is a diagrammatic view of the slip rings of the switch-or circuit closer showingl also a portion of the main line and local circuits including the receiver and transmitter.

In carrying out the objects stated a hollow arm -1- having an extension Q carrying a transmitter 3 and receiver arm 4 1s mounted for horizontal swinging movement upon a suitable support 5-- `which may be a desk, table t-op, standard or any other fixed member capable of sustaining the swinging member 1 and parts mounted thereon in operative position and permitting such arm to be shifted to any desired position about its axis.

As shown in the drawings, the hollow arm 1 consists of a tubular metal elbow,-

one arm of which extends horizontally, while the other arm is disposed in an upright position and passed through an opening 5- in the support 5- and through an upright sleeve or tube 6- which is also passed through the opening 5 Both of these tubular parts 1 and 6 extend some distance below the support 5- and are locked together for simultaneous rotation by a clamping bolt 7 which is passed dia- `metrically through suitable apertures in the sleeve 6 and also through elongated 8 in the adjacent portion of the tubular arm l-, thereby permitting a Vlimited longitudinal or vertical adjustment of the arm 1 relatively to the sleeve 6 to bring the transmitter and receiver to the desired height most convenient for the operator. These two tubular members 1 and 6 are therefore locked together to rotate as a unit and are ournaled in suitable bearings Q and 10 locatedy respectively above and beneath the support 5- and held in place by clamping bolts 1l-. A suitable buffer 12 of felt, rubber or equivalent material is interposed between the base of the bearing Q and upper face of the support 5- to form a muiiier for the purpose of preventing reverberation of sound from the support 5- to the telephonie instruments. The bearing 10- is .made in the form of a cylindrical collar Y ing encircling the sleeve -6- and piovided with a recess -13- for receiving a flange 14- on said sleeve. Interposed between this collar and the under side of the support -5- is the top -15- of a switch box -16 and a suitable buffer 1T- of felt, rubber or similar material, the latter being interposed between the top l5- and under side of the support -5- for preventing reverberation of sound from said support to the hollow member l and telephonie instruments carried thereby, the arm -lbeing held against axial movement by collars -9- and l0-. Prior to the clamping of the switch box to the under side of the table, the collar w10- is adjust-ably secured to the top of the switch box by means of screws -lsul'licient clearance being left to permit a slight axial adjustment o-f the collar.

A concavo-convex spring washer -l8- is interposed between the base of the socket i3- and under side of the flange i4- so that when the screws -lare properly adjusted the spring washer is slightly compressed between the base of the socket -l3- and flange m14.- tliereby frictionally holding the rotary members 1- and 6 in their adjusted position, and at the same time permitting them to be turned horizontally to bring the receiver and transmitter to any position about the swingaxis. Suitable washers -19- of leather or equivalent material containing a lubricant are interposed between the opposite faces of the flanges -14 and adjacent faces of the top -15 and collar w10- respectively, so as to prevent excessive friction between the revolving members and fixed parts.

The hollow extension -2- is adjustable rotarily and axially in the adjacent end of the hollow arm --lto permit the transmitter and receiver to travel through an arc of longer or shorter radius or tilted bodily to any angle as may be desired, said extension being held in its adjusted position by a split clamping collar -20 or equivaient device. The outer end of the extension -2- is furoated forming opposite ears 21 for receiving between them a reduced portion 22- on the lower end of the receiver arm -4L said ears 2l and reduced portion --22n being provided with registering apertures for receiving a clamping bolt W28- which serves the double purpose of clamping the transmitter -3- to the extension "2* and also forms a pivotal connection between said extension and receiver arm upon which said receiver arm may freely swing.. A nut 24- engages the outer end of the bolt -23- and adjacent ear or lug 2l and serves to frictionally bind said ears -21- against the reduced portion -22- to hold the receiver arm in its adjusted position. The main portions of the peripheries of the ears 21- are concentric with the swinging axis of the receiver arm -1-- but their lower sides are provided with eccentric portions -25-- forming limiting stops adapted to be engaged by shoulders 26- on said receiver arm for limiting the downward swinging movement of the latter and thereby preventing injury by cutting or shearing against the circuit connections presently described, the base of the ears -21- forming a similar limiting stop for engaging the adjacent end of the opposite side of the receiver arm.

A receiver -27- is mounted for independent oscillatory movement upon the outer end of the receiver arm iland for this purpose is provided upon its rear with a U-shaped clamp 2S- having spherical sockets 29 for receiving and engaging opposite faces of a ball member -30-, the latter being secured to a cap 3l in the extreme outer end of the receiver arm The receiver -27- is therefore connected to the arm -Llby a universal joint which permits a limited oscillation of said receiver in any direction to bring the- .A suitable circuit closer m34- together `with the insulation -35- is secured to the varms -1-- and -aand extension -2-,

leaving only a slight portion thereof exposed at the junction of said receiver arm with the extension and also at a point near the receiver as shown in Fig. 2, although in Fig. 7 the circuit connections for the receiver enter directly into said receiver from the interior of the hollow arm 1- The terminal ends of the circuit connections -38-9 and -38- where they emerge through the lower end of the tubular arm 1- are connected to segmental terminals -39- on the insulating sleeve -35-, so as to rotate with the arm 1- and sleeve -6-, thereby preventing any possibility of twisting, kinling or otherwise straining the circuit connections or their astenings as the supporting arm 1 for the receiver and transmitter is swung laterally. c

InFig. l2 is shown diagrammatically the circuit connections for the receiver, transmitterand circuit closer and also a portion of the main line and additional switches for opening and closing the primary and secondary circuits of the induction coil, hereinafter described. The circuit closer comprises a series of, in this ins-tance tour, sliprings A B O and D which together with the terminal segment 39 are coaXially mounted for simultaneous rotas tion with the sleeve 6 and supporting arm l The conduct-ing segments of each slip ring are electrically-V connected to each other and to one of the terminal segments 39 as clearly shown in Fig. 12, so that the wires 38 leading from the transmitter are electrically connected respectively to the conducting segments of the slip rings A and. B while the conducting` wires 38 leading from the receiver are electrically connected respectively to the conduct-ing segments of the slip rings Q and D YVhen the conducting` segments of the circuit closer are brought into contact with their respective brushes 36 the receiver 27 is electrically connected in series with a condenser E across the main kline circuit F through the medium of a switch --G- which is normally in Contact with a terminal g forming a part of such circuit. This circuit leads from one side of the main line F through wire 40 to one side of the condenser E and thence by wires M and Q to the switch G- and terminal --gthrough wires 13- and 44- to the conducting segments ot the ring C- and thence by wire 45 to one of the segmental terminals 39 which is connected by one of the wires 38 to the receiver, the other receiver wire being connected to another one of the terminals 39 and thence by wire 46 to the conduct-ing segments of the slip ring D- which in turn is connected by wires 47 and 4;8 to the other side of the main line F A retard coil H- is connected across the receiver circuit wires 42- and 43- and is adapted to be connected in series with the receiver in a manner presently described. The switch G may be moved out of contact with the terminal Q and into contact with another terminal g by any suit-able operating device, as G operable at will, said operating member being also employed to simultaneously operate a normal open switch 1 into contact with a terminal z' This terminal is electrically connected to one pole of a source of electric energy as a battery J the other pole of said battery being connected by wires 49 and 50 to the conducting segments ofthe slip ring B- when in contact with the corresponding brush 36 said conducting segment being connected by a wire 5l to one ot the terminal segments 39 which in turn is connected to one of the transmitter wires 3S the other vtransmitter wire being electrically connected to a different terminal segment 39- and thence by wire 52 to the conducting segments of the slip ring A Vhen these conducting segments of the ring A are in contact with corresponding brush 36 they are electrically connected by a wire 53 to one side ot the primary winding 5-t ot an induction coil K the other side of said primary coil being connected by wires 55 and 56- to the switch I- which is` now in contact with the terminal z' thus completing the circuit through'the primary winding of the induction coil. At the same time that the switch 1 is forced into contact with the terminal z' the switch G- is brought into contact with the terminal g connecting the retard. coil H in series with the receiver as follows: From one side of the secondary coil, as 57 by wires 58- and 59 through terminal g and switch member G- thence by wires fll2 and 60 to one side of thev retard co1 to the conducting segments of the slip ring C which are connected to the receiver through the medium of the wires 38 terminal segments 39 and wire 45 one of the segments 39 being connected vby a wire 46- to the conducting segments of the slip ring D- which when in contact with the corresponding brush 36 are connected by wires 47 and 62 to the opposite side of the secondary coil. Or on the other hand, tracing the circuitfrom the main line when the conducting members of the slip rings are in contact with their respective brushes, the current passes through one side of the main lineB from the wire 40 condenser E wires M and 60 through the retard coil and wires 61 and 44t slip ring C- through the receiver and return through the wire 4G- slip ring D and wires 47 and 48 to the other side of the main line.

thencefrom the opposite side of ,Y 'the retard coil by wires Gl and M The operating member Gr may be of terminals and switch members are connected. It it to be understood, however, that aside from the mounting of the circuit closer upon the rotary arm 1- so as to open and close the several circuits by the mere rotat-ion of such arm, the details of construction may be varied considerably without departing from the spirit of my invention, therefore I do not limit myself to the exact construction and arrangement as shown and described.

That I claim is:

1. In a telephonic system, a rotary support, a hollow receiver arm mounted on the support, a receiver mounted upon the receiver arm, a slip-ring on the rotary support and circuit connections between the slipring and receiver and extending through the receiver arm.

2. In a telephonic system, a rotary tubular support and a hollow receiver arm pivoted thereto, a receiver on said arm, a transmitter on the support at its junction with the receiver arm, ball and socket connections between the receiver and arm whereby the receiver may be oscillated in any direction, slip-rings on the support and circuit connections leading from the slip-rings to the transmitter and to the receiver.

3. In a telephonie system, a hollow arm mounted for rotary movement, a transmitter and a receiver carried by said arm, a slip ring rotating with the arm, a brush contacting with the ring, and circuit connections for the receiver and transmit-ter passed through said arm, one at least of said connections being connected to the slip ring.

4. In a` telephonie system, a hollow arm` mounted for horizontal rotary movement, a transmitter carried by the arm, a slip ring rotatable with said arm, a brush in contact with the slip ring, and circuit. connections between the slip ring and transmitter passing through the hollow arm.

5. In a. telephonic system, a hollow arm mounted for rotary movement, a transmitter mounted on the arm, a hollow receiver arm mounted for swinging movement upon the irst named arm, a receiver on the receiver arm, slip rings rotating with the first named arm, brushes contacting with the slip rings, and circuit connections passing through the hollow arms and connecting the slip rings to the transmitter and to the receiver.

6. In a telephonic system, a supporting bed, a hollowr arm passing through the bed and mounted thereon for rotary movement, telephonie instruments carried by the arm above the bed, slip-rings rotating with the arm below the bed, and circuit connections between the slip-rings and said instruments and passing through the hollow arm.

7. In a telephonie system, a supporting bed, a hollow arm passing through t-he bed and mounted thereon for rotary movement, telephonie instruments carried by the arm above the bed, a circuit closer rotating wit-h the arm below the bed, circuit connections between the circuit closer and said instruments and passing through the hollow arm, and muftlers interposed between the bed and bearings for the arm to prevent reverberation of sound from the bed to the instruments.

8. In a telephonie system, in combination with a table top and vertical journal bearings thereon, a hollow arm mounted for rotary movement in said bearings and eX- tending through the table top, said arm having a lateral offset above the table top, a transmitter mounted on said arm, a hollow receiver arm hinged to the transmitter arm, areceiver on the receiver arm, slip-rings mounted on the first named arm below the table top, and circuit connections passing through the hollow arms and connecting the slip-rings to the receiver and to the transmitter.

In witness whereof I have hereunto set my hand on this 22nd day of January 1910.

SAMUEL LEVIS VAN AKIN, JR. lVtnesses H. E. CHASE, A. L. HUMPHREY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

